Manufacturers of reverse trikes do a lot of development of electronic stability systems that are required to prevent spin-outs at or beyond the limits of traction. For that reason I wouldn't consider a DIY reverse trike, even if it could be made to look attractive.
MY 99 rev trk valk is more stable than my 2010 spider was an
faster and better fuel more relible I live in Riverview FLA if you
would like to see and ride it